The following questions pertain to aqueous solutions of potassium bromide

Asked by maham237 @ in Advanced Placement (Ap) viewed by 731 People

A. Draw a representation that shows the interactions between the solute and solvent in an aqueous solution of potassium bromide.

B. Explain why potassium bromide dissolves in water

Answered by maham237 @


A. KBr dissociates (dissolves) when in water. So draw a solution with potassium ions and bromine ions. Since the potassium ion has a positive charge, the oxygen of H2O molecules (negative charge, because water molecules are polar) will be attracted towards the potassium ion with a positive charge. Also draw bromine ions (negative charge), with the hydrogen ends of water molecules attracted to it (because the hydrogen end of water molecules have a positive charge). Make sure the amount of potassium ions and bromine ions are equal because the ratio of potassium to bromine is 1:1

B. According to solubility rules, Br- is soluble with everything else except Ag 2+, Hg2 2+, and Pb 2+.SInce potassium is neither of the three, Br is soluble when with K.

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